.login{
    position: fixed;
    top: 50%;
    left: 50%;
    min-width: 300px;
    min-height: 400px;
    transform: translate(-50%,-50%);
    background: #ddd;
    display: flex;
    justify-content: center;
    align-items: stretch;
}
.login > .form{
    /* background: red; */
    width: 100%;
    /* height: 100%; */
}